CPW-Fed Ultra-Wideband Lotus-Shaped Quasi-Fractal Antenna

Dong-Jun KIM  Tae-Hak LEE  Jun-Ho CHOI  Young-Sik KIM  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.12   pp.3890-3894
Publication Date: 2012/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.3890
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Antennas and Propagation
ultra-wideband antenna,  monopole antenna,  coplanar waveguide,  quasi-fractal,  

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In this letter, a novel ultra-wideband circular quasi-fractal monopole antenna with a six-petaled lotus pattern is presented. The CPW-fed technique and quasi-fractal concept are used to achieve ultra-wideband characteristics. The size of the proposed antenna is 4250 mm2 with a lotus diameter of 19.8 mm. The proposed antenna exhibits ultra-wideband characteristics from 2.65 to 12.72 GHz, which corresponds to a fractional bandwidth of 131%. The measured radiation pattern of the proposed antenna is nearly omnidirectional.